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Finding the Fourth Proportional to 22,147.60, 33,221.40 and 19,728.40

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Solution

The fourth proportional to 22,147.60, 33,221.40 and 19,728.40 is: 29,592.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    22,147.60 : 33,221.40 = 19,728.40 : x
  2. Step 2: Convert to fraction form
    22,147.60/33,221.40 = 19,728.40/x
  3. Step 3: Cross multiply
    22,147.60x = 33,221.40 × 19,728.40
  4. Step 4: Simplify right side
    22,147.60x = 655,405,067.76
  5. Step 5: Solve for x
    x = 655,405,067.76/22,147.60
  6. Step 6: Final answer
    x = 29,592.60

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Similar ratio
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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.